/**
 * 输出：
 * <p>
 * *
 * **
 * ***
 * ****
 */
public class ForTest {
    public static void main(String[] args) {
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println("");
        }
    }
}
